If you want to translate the menus like 'Tools' in backend, you have two ways to do that:
1- go to your MySQL database and find the rows about CB in the 'jos_components' table. You have to edit the 'name' and 'admin_menu_alt' fields. Indeed, when you installed CB, Joomla used the 'comprofiler.xml' file to fill these rows. If you open this file, you can find in line 315 :
[code:1] <menu>Community Builder</menu>
<submenu>
<menu task="showusers">User Management</menu>
<menu task="showTab">Tab Management</menu>
<menu task="showField">Field Management</menu>
<menu task="showLists">List Management</menu>
<menu task="showPlugins">Plugin Management</menu>
<menu task="tools">Tools</menu>
<menu task="showconfig">Configuration</menu>
</submenu>
[/code:1]
2- the second possibility is, before to install CB, to unzip the package and to edit the 'comprofiler.xml' file (see above). Save it, remake the zip package and finally install CB.
Sure it would be better to have a language plugin system to translate CB backend...